graphics: emit PS5 register object and primitive IDs to RT7

src/graphics/shader/shader.h

@@ -204,6 +204,7 @@ struct ShaderPixelInputInfo {
 	bool                                           ps_sample_mask_export_enable = false;
 	bool                                           ps_sample_shading            = false;
 	bool                                           dual_source_blending         = false;
+	bool                                           object_primitive_id          = false;
 	// Export logical alpha or per-channel source factors through MRT1 after channel swizzling.
 	ShaderAlphaBlendSource                         alpha_blend_source = ShaderAlphaBlendSource::None;
 	bool                                           ps_early_z                   = false;